Automatic gun.



' citizen of the German Empire, residing at I clear, and exact'description of the invenwhen broken easily be replaced by a new V'one without the use of special tools. And

Improvements in Automatic VV: Guns; andI "common to the firing pin and the safety sear and disposing the said spring between a nose of the ring pin and the end of the position, and Fig. 2, isf-- a similar section .UMTED ,STAMFENT @Enroll.il

KARL HEINEMANN, '0F BERLIN, GERMANY, ASSIGNOR TO DEUTSCHE* WAFFEN- MUNITIONSFABRIKEN, OF BERLIN, GERMANY.

AU'roMATIc Gun. i

specification of Letters-Patent.

Application filed February 8, 1912f -Serial No. 676,282.

To all whom/it may concern:

Be it known that I, KARL HEINEMANN, a

Berlin, in the Kingdom of Prussia, Germany, have invented certain new and useful do hereby declare the following to be a full,

tion, such as will enableothers skilled in the art to which it lappertains v to make and use the same. v l- My invention relates to'improvements in' automatic guns, and more particularly in automatic guns of the Maxim type. guns of this class such as are'now in use the firing pin and the tumbler coperating therewith are acted upon by the same spring which for this purpose has two branches. This spring is subject to breakage after continued use, and if broken it lcan but diffip cultly be replaced by a newspring. l

The object of the improvements is 'to construct the mechanism controlling the oper ation of the ring pin in such a way, that the spring of the firingv pin is not in the same degree subject tobreakage and can with this object in view iny invention lcon# sists in providing a coiled spring whichis safety sear, so that after removing' the bolt of the safety sear and slightly .depressing the breech block the safety sear and the spring can ,be removed and replaced by new parts.

In order that my invention be -more clearly understood an example embodying thev same has been shown in the accompanying drawing in which the same letters of reference have been used in all the views to indicate corresponding parts. A

In said drawings*Figure l, is a vertical longitudinal section yof the casing of the breech block and the parts' mounted therr'eon, l the parts being shown in the closed breech showing the parts inthe-open breech position. Referring :to the eXainple illustrated in Y ating the firkg of a safety scarpa coiled spring common to said firing pin and safety sear and.v ari i' Y the drawings, the hand sear o is equipped with a small spring?a of its own. For lop'erpin d a coiled spring'fl` is provided whi bears-with one of itsends on a nose lo secureito or made integral kwith the firing pin. Atthe opposite end a pin Z is embedded in the coiled spring, which pin is formed with a head Z'having a beveled 60 l front face. A t theA outside ofthe breech block casing a safety se ar f is located whichl is'pivoted tox'the casing at p.' The freefend of the sear isi'1 bent downward and forward and into .position for engagement with a` In 'notch e of the firing pin. AIt is engaged fby the 'beveled head Z of the pin Z, the latter having the tendency to hold the sear .downward and in engagement with the safety pin.` l In Fig. l the parts have been shown in the closed breech position. The breech block toggle lever m has been rocked upward and has disengaged the safety' sear from the firing pin by engaging a nose y, The tumbler n has been released by the hand lsear 0, andthe firing pin has been thrown forward.

In Fig. 2 I have shown the parts in the position which they have priorI to firing. The breech block toggle lever m has been rocked downward, the tumbler'n is locked by the hand sear and the safety sear engages the notch e of the ring pin bybeing pulled downwardA by the spring actuated head Z engaging with its beveled face the inclined end of the safety sear. At this time the breech block toggle lever m has 'disengaged the nose y of the safety sear.

I claim herein as my invention: l. In -a firingv mechanism for` automat-ic guns, the combination with the firing pin, of

-a safety Sear, a spring common to said firing pin and safety sear and arranged to operate the firing pin and to hold the safety sear in locking position, means t-o lock said firing pin in'position ready for firing, and means to throw said safety sear and locking means out of operation. y

2. Ina firing mechanism for automatic guns, the combination with the-firing pin,

ranged to operatethe firing pin and ilo/hold:

the safety scar in locking position, meansto Y man Heumann-26,1912..

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lock said ring pin in lposition ready for firing, and means to throw 'said safety scar and locking means out of operation.`

3.1m a firing mechanism for automat-ic'y guns, the'eOmbination with the firing pin,-

of a safety`r` sear, a resilient means common to said firing pin Aand safety sear andarranged to operate said firing pin and tohold the safety scar in locking-position, saidv safety sear bengprovided with a shoulder acted on by said resilient means and havingv its face inclined relatively to thel direction of the forcev exerted by the` resilient means, means to. lock said firing pinin position 'ready for ring, and means to throw lsaid -sear and locking means outof operasafety tion.

4. In a firing .mechanism for automatic guns, the combination with the firing'fpin, of a safety sear, a coiledspring common -to said ring pin and safety 'sear and arranged to operate said firing pin, a block mounted on said spring and having its face inclined relatively to the axis of the spring, said Sear having a shoulder engaged by said block and inclined accordingly and adapted in combination with said block to hold the Sear in locking engagement with the firing pin, means to lock said ring pin i-n position ready for firing, and means to throw said safety sear and locking means out of operation.

5. In a firing mechanism for automatic guns, the `combination with the breech block, and means to move 'the same into position for pening andclsing the breech, of a liring pin, its operating mechanism, a safety sear, and a spring common to said firing pin and'safety sear and arrangedfto throw the firing pin and 'to hold the safety Sear in locking engagement with the irin pin, said safety sear being so positioned re atively to.

the breech block operating means-.as to be 1 of said breech block operating means and adapted in combination with the breech block operating means to throw said scar into non-locking position upon the arrivalv of the breech block in breech closing position. y

7. In a iiring mechanism for automatic guns, the combination of a breech block, a iring pin within said breech block and provided with a recess, a safety sear arranged to enter said recess and -lock said firing piny against operation, a projection on said safety scar, resilientmeans common to said firing pin and safety Sear arranged to opcrate scar m the recess thereof and mechanism for operating the breech block and arranged-to engage and `support. said pro]ect1on when the breech block is closedwhereby the safety 'searis moved and maintained out of the recess of the firing pim-said mechanism being movable away from said projection as the ,breech block is opened to permit the safety sear to be returned to-locking position in said recess.

A. 8. In a firing mechanism for automatic guns, the combination with the breech block, i

comprising a frame or casing open at the rear and bottom, and o erating mechanism for said breech block, o a ring pin located within said frame or casing in registry with the axis of the barrel when the breech vblock vis in breech closing position, a safety scar arranged to engage the firing pin at the open end of the casing and in-p{osition for.b.e1ng thrown by said breech bloc anism into unlockin position, and a spi'in located within said reech block casing and commento said firing pin and safety scar for throwing the firing pin and holding the said iring-pinand to hold said safety operating mechsafety scar in locking position, said spring' l acting on thel safety sear at the open end the casing and adapted to be removed t0- ward the lrear of the breech block. 9. In a firing mechanism for automatic guns, the combination' with the breech block, comprising a frame or casing open `at the rear and bottom, and o erating mechanism for said breech block, or a firing pin located within said casing in registry with the axis of the barrel when the breech block is in closing position, a safety vscar located outside said casing and arranged to engage the firing pin at the open end of the casing vand in position for being thrown by saidbreech block operating mechanism into unlocking 4 position, and a coiled spring located within said breech block casing longitudinally of the firing pin and common to said firing pin and safety sear for throwing the firing pin and holding the safety sear in lockingposition, said spring acting on the safety sear at the open end of the casing and adapted to be removed toward the rear of the breech block.

10. In a firing mechanism for automatic guns, the combination of a breech block, a firing pin within said breech block, a safety sear arranged to lock said firing pin against operation, resilient means common to said firing pin and safety Sear arranged to operate'said firing pin and to hold said safety scar in its locking position and mechanism for operating the breech block and arranged lturned to locking positiom to engage said safety sear when the-,bxleech `In testimony whereof I hereunto setmy4 block. is cosed whereby saidf safety Sear isl hand in the presence of two witnesses.

moyed an maintained out o lockmg posi- A Y' tion, vsaid mechanism being movable away KARL HEINEMANN' 5 lfrom said safety sears as the breech blopk is Witnesses: 4 l

opened to permit the safety Sear to be re-v WOLDEMAR HAUPT,

' HENRY HASPER. 

